Abstract Evidence presented in the foregoing study indicates a strong dependance of dilutability on the fraction of effective chains. There is some dependence on the level of crosslinking and, perhaps, on solvatibility of the polymeric network in question. Thus, it is possible that networks prepared from different prepolymers but with the same FEC might show some difference in dilutability. This is a difficult question to answer, as well-characterized prepolymers that could serve as a standard are not available. Dilutability should be particularly useful in quality-control type applications, where lot to lot differences of essentially the same prepolymer are assessed.